Forums

200V amplifier

Started by maxascent November 22, 2011
I need an amplifier that can amplify a 5V p-p (range 5V to 0V) signal to
200V p-p (range 200V to 0V). The bandwidth needs to be at least 500 kHz.
Does anyone know of a circuit or maybe an opamp that is capable of this?

TIA

Jon	   
					
---------------------------------------		
Posted through http://www.Electronics-Related.com
On Nov 22, 9:12=A0am, "maxascent"
<jbean@n_o_s_p_a_m.n_o_s_p_a_m.beandigital.co.uk> wrote:
> I need an amplifier that can amplify a 5V p-p (range 5V to 0V) signal to > 200V p-p (range 200V to 0V). The bandwidth needs to be at least 500 kHz. > Does anyone know of a circuit or maybe an opamp that is capable of this? >
Have a look at: http://www.cirrus.com/en/products/apex/index.html John
Am 22.11.2011 10:12, schrieb maxascent:
> I need an amplifier that can amplify a 5V p-p (range 5V to 0V) signal to > 200V p-p (range 200V to 0V). The bandwidth needs to be at least 500 kHz. > Does anyone know of a circuit or maybe an opamp that is capable of this?
have a look at AN18 from Linear Technology, fig. 9. The circuit shown is designed for +/-120V output swing but it can easily be modified for unipolar operation. Alexander
maxascent wrote:
> I need an amplifier that can amplify a 5V p-p (range 5V to 0V) signal to > 200V p-p (range 200V to 0V). The bandwidth needs to be at least 500 kHz. > Does anyone know of a circuit or maybe an opamp that is capable of this? > > TIA > > Jon > > --------------------------------------- > Posted through http://www.Electronics-Related.com
Isn't it important to specify the load impedance or something similar? AC or DC coupled?
"mike"
> maxascent wrote: > >> I need an amplifier that can amplify a 5V p-p (range 5V to 0V) signal to >> 200V p-p (range 200V to 0V). The bandwidth needs to be at least 500 kHz. >> Does anyone know of a circuit or maybe an opamp that is capable of this? >> >> Posted through http://www.Electronics-Related.com > > Isn't it important to specify the load impedance or something similar? > AC or DC coupled? >
** Hey - don't annoy a fuckwit code scribbler with reality. It only makes them worse. ... Phil
On Nov 22, 4:57=A0am, John Walliker <jrwalli...@gmail.com> wrote:
> On Nov 22, 9:12=A0am, "maxascent"<jbean@n_o_s_p_a_m.n_o_s_p_a_m.beandigit=
al.co.uk> wrote:
> > I need an amplifier that can amplify a 5V p-p (range 5V to 0V) signal t=
o
> > 200V p-p (range 200V to 0V). The bandwidth needs to be at least 500 kHz=
.
> > Does anyone know of a circuit or maybe an opamp that is capable of this=
?
> > Have a look at: > > http://www.cirrus.com/en/products/apex/index.html > > John
Oh, did cirrus buy up apex? George H.
On Nov 22, 6:31=A0am, mike <spam...@gmail.com> wrote:
> maxascent wrote: > > I need an amplifier that can amplify a 5V p-p (range 5V to 0V) signal t=
o
> > 200V p-p (range 200V to 0V). The bandwidth needs to be at least 500 kHz=
.
> > Does anyone know of a circuit or maybe an opamp that is capable of this=
?
> > > TIA > > > Jon > > > --------------------------------------- > > Posted throughhttp://www.Electronics-Related.com > > Isn't it important to specify the load impedance or something similar? > AC or DC coupled?
Yeah a nice transformer might do it. George H.
On Nov 22, 2:58=A0pm, George Herold <gher...@teachspin.com> wrote:
> On Nov 22, 6:31=A0am, mike <spam...@gmail.com> wrote: > > > maxascent wrote: > > > I need an amplifier that can amplify a 5V p-p (range 5V to 0V) signal=
to
> > > 200V p-p (range 200V to 0V). The bandwidth needs to be at least 500 k=
Hz.
> > > Does anyone know of a circuit or maybe an opamp that is capable of th=
is?
> > > > TIA > > > > Jon > > > > --------------------------------------- > > > Posted throughhttp://www.Electronics-Related.com > > > Isn't it important to specify the load impedance or something similar? > > AC or DC coupled? > > Yeah a nice transformer might do it.
500kHz of bandwidth is asking a bit much of the nicest transformer with a 40:1 ratio. Transmission line transformers do offer that kind of bandwidth, but you are restricted by the characteristic impedances of practicable transmission lines. I can see getting 2:1 at 25R out of a first stage wound with two strands of coax, connected in parallell, which could then drive a second 2:1 stage wound with twisted pair chosen for a 100R characteristic impedance for a total step-up of 4:1 with an output impedance of 400R, but that still leaves a factor of ten to go. -- Bill Sloman, Nijmegen
On Tue, 22 Nov 2011 05:57:57 -0800, George Herold wrote:

> On Nov 22, 4:57&nbsp;am, John Walliker <jrwalli...@gmail.com> wrote: >> On Nov 22, 9:12&nbsp;am, >> "maxascent"<jbean@n_o_s_p_a_m.n_o_s_p_a_m.beandigital.co.uk> wrote: >> > I need an amplifier that can amplify a 5V p-p (range 5V to 0V) signal >> > to 200V p-p (range 200V to 0V). The bandwidth needs to be at least >> > 500 kHz. Does anyone know of a circuit or maybe an opamp that is >> > capable of this? >> >> Have a look at: >> >> http://www.cirrus.com/en/products/apex/index.html >> >> John > > Oh, did cirrus buy up apex?
Yes, several years ago. I was trying to remember who bought Apex (I was thinking Cypris) when I saw John's post. There needs to be a website -- www.whoboughtwhom.com -- to keep track of things like Apex and Cirrus, and Motorola Semiconductor Division and FreeFall Semiconductor, and Bell Aerospace and Bell/Textron, etc. You could probably make money at it, if you could figure out an easy indexing scheme, and sell ads. -- www.wescottdesign.com
On Tue, 22 Nov 2011 01:57:39 -0800, John Walliker wrote:

> On Nov 22, 9:12&nbsp;am, "maxascent" > <jbean@n_o_s_p_a_m.n_o_s_p_a_m.beandigital.co.uk> wrote: >> I need an amplifier that can amplify a 5V p-p (range 5V to 0V) signal >> to 200V p-p (range 200V to 0V). The bandwidth needs to be at least 500 >> kHz. Does anyone know of a circuit or maybe an opamp that is capable of >> this? >> > Have a look at: > > http://www.cirrus.com/en/products/apex/index.html
They're very nice amps, if you have money for parts and not much time for design. -- www.wescottdesign.com